libpayload-x86: Add common i8042 driver
Add a common i8042 driver that uses multiple overflowing fifos to seperate PS/2 port and PS/2 aux port. Required to support PC keyboard and PC mouse at the same time. Tested on Lenovo T500. Change-Id: I4ca803bfa3ed45111776eef1f4dccd3fab02ea39 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/18594 Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
parent
2b2f89565e
commit
e6a3821b97
|
@ -329,6 +329,12 @@ config FONT_SCALE_FACTOR
|
|||
By default (value of 0), the scale factor is automatically
|
||||
calculated to ensure at least 130 columns (when possible).
|
||||
|
||||
config PC_I8042
|
||||
bool "A common PC i8042 driver"
|
||||
default n
|
||||
help
|
||||
To be used by PC_KEYBOARD and PC_MOUSE.
|
||||
|
||||
config PC_KEYBOARD
|
||||
bool "Allow input from a PC keyboard"
|
||||
default y if ARCH_X86 # uses IO
|
||||
|
|
|
@ -38,6 +38,7 @@ libc-$(CONFIG_LP_S5P_SERIAL_CONSOLE) += serial/s5p.c serial/serial.c
|
|||
libc-$(CONFIG_LP_IPQ806X_SERIAL_CONSOLE) += serial/ipq806x.c serial/serial.c
|
||||
libc-$(CONFIG_LP_IPQ40XX_SERIAL_CONSOLE) += serial/ipq40xx.c serial/serial.c
|
||||
libc-$(CONFIG_LP_BG4CD_SERIAL_CONSOLE) += serial/bg4cd.c serial/serial.c
|
||||
libc-$(CONFIG_LP_PC_I8042) += i8042/i8042.c
|
||||
libc-$(CONFIG_LP_PC_KEYBOARD) += keyboard.c
|
||||
|
||||
libc-$(CONFIG_LP_CBMEM_CONSOLE) += cbmem_console.c
|
||||
|
|
|
@ -0,0 +1,393 @@
|
|||
/*
|
||||
* This file is part of the libpayload project.
|
||||
*
|
||||
* Patrick Rudolph 2017 <siro@das-labor.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <libpayload-config.h>
|
||||
#include <libpayload.h>
|
||||
#include <stddef.h>
|
||||
|
||||
/* Overflowing FIFO implementation */
|
||||
|
||||
struct fifo {
|
||||
u8 *buf;
|
||||
size_t tx;
|
||||
size_t rx;
|
||||
size_t len;
|
||||
};
|
||||
|
||||
/** Initialize a new fifo queue.
|
||||
* Initialize a new fifo with length @len.
|
||||
* @len: Length of new fifo
|
||||
* Returns NULL on error.
|
||||
*/
|
||||
static struct fifo *fifo_init(size_t len)
|
||||
{
|
||||
struct fifo *ret;
|
||||
|
||||
ret = malloc(sizeof(*ret));
|
||||
if (!ret)
|
||||
return NULL;
|
||||
|
||||
memset(ret, 0, sizeof(*ret));
|
||||
|
||||
ret->buf = malloc(len);
|
||||
if (!ret->buf) {
|
||||
free(ret);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
ret->len = len;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/** Push object onto fifo queue.
|
||||
* Pushes a new object onto the fifo. In case the fifo
|
||||
* is full the oldest object is overwritten.
|
||||
* @fifo: Fifo to use
|
||||
* @c: Element to push
|
||||
*/
|
||||
static void fifo_push(struct fifo *fifo, u8 c)
|
||||
{
|
||||
fifo->buf[fifo->tx++] = c;
|
||||
fifo->tx = fifo->tx % fifo->len;
|
||||
if (fifo->tx == fifo->rx)
|
||||
fifo->rx++;
|
||||
fifo->rx = fifo->rx % fifo->len;
|
||||
}
|
||||
|
||||
/** Test fifo queue element count.
|
||||
* Returns 1 if fifo is empty.
|
||||
* @fifo: Fifo to use
|
||||
*/
|
||||
static int fifo_is_empty(struct fifo *fifo)
|
||||
{
|
||||
return fifo->tx == fifo->rx;
|
||||
}
|
||||
|
||||
/** Pop element from fifo queue.
|
||||
* Returns the oldest object from queue if any.
|
||||
* In case the queue is empty 0 is returned.
|
||||
* @fifo: Fifo to use
|
||||
*/
|
||||
static u8 fifo_pop(struct fifo *fifo)
|
||||
{
|
||||
u8 ret;
|
||||
|
||||
if (fifo_is_empty(fifo))
|
||||
return 0;
|
||||
|
||||
ret = fifo->buf[fifo->rx++];
|
||||
fifo->rx = fifo->rx % fifo->len;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/** Destroys a fifo queue.
|
||||
* @fifo: Fifo to use
|
||||
*/
|
||||
static void fifo_destroy(struct fifo *fifo)
|
||||
{
|
||||
if (fifo && fifo->buf)
|
||||
free(fifo->buf);
|
||||
if (fifo)
|
||||
free(fifo);
|
||||
}
|
||||
|
||||
/* i8042 keyboard controller implementation */
|
||||
|
||||
static inline u8 read_status(void) { return inb(0x64); }
|
||||
static inline u8 read_data(void) { return inb(0x60); }
|
||||
static inline void write_cmd(u8 cmd) { outb(cmd, 0x64); }
|
||||
static inline void write_data(u8 data) { outb(data, 0x60); }
|
||||
|
||||
#define OBF 1
|
||||
#define IBF 2
|
||||
|
||||
/* Keyboard controller methods */
|
||||
static int initialized = 0;
|
||||
static int kbc_init = 0;
|
||||
static struct fifo *aux_fifo = NULL;
|
||||
static struct fifo *ps2_fifo = NULL;
|
||||
|
||||
static int i8042_cmd_with_response(u8 cmd);
|
||||
|
||||
/** Wait for command ready.
|
||||
* Wait for the keyboard controller to accept a new command.
|
||||
* Returns: 0 on timeout
|
||||
*/
|
||||
static u8 i8042_wait_cmd_rdy(void)
|
||||
{
|
||||
int retries = 10000;
|
||||
while (retries-- && (read_status() & IBF))
|
||||
udelay(50);
|
||||
|
||||
return retries > 0;
|
||||
}
|
||||
|
||||
/** Wait for data ready.
|
||||
* Wait for the keyboard controller to accept new data.
|
||||
* Returns: 0 on timeout
|
||||
*/
|
||||
static u8 i8042_wait_data_rdy(void)
|
||||
{
|
||||
int retries = 10000;
|
||||
while (retries-- && !(read_status() & OBF))
|
||||
udelay(50);
|
||||
|
||||
return retries > 0;
|
||||
}
|
||||
|
||||
/** Keyboard controller has a ps2 port.
|
||||
* Returns if ps2 port is available.
|
||||
*/
|
||||
size_t i8042_has_ps2(void)
|
||||
{
|
||||
return !!ps2_fifo;
|
||||
}
|
||||
|
||||
/** Keyboard controller has an aux port.
|
||||
* Returns if aux port is available.
|
||||
*/
|
||||
size_t i8042_has_aux(void)
|
||||
{
|
||||
return !!aux_fifo;
|
||||
}
|
||||
|
||||
/**
|
||||
* Probe for keyboard controller
|
||||
* Returns: 1 for success, 0 for failure
|
||||
*/
|
||||
u8 i8042_probe(void)
|
||||
{
|
||||
if (initialized)
|
||||
return 1;
|
||||
|
||||
aux_fifo = NULL;
|
||||
ps2_fifo = NULL;
|
||||
|
||||
/* If 0x64 returns 0xff, then we have no keyboard
|
||||
* controller */
|
||||
if (read_status() == 0xFF)
|
||||
return 0;
|
||||
|
||||
if (!i8042_wait_cmd_rdy())
|
||||
return 0;
|
||||
|
||||
kbc_init = 1;
|
||||
|
||||
/* Disable first device */
|
||||
if (i8042_cmd(0xad) != 0) {
|
||||
kbc_init = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Disable second device */
|
||||
if (i8042_cmd(0xa7) != 0) {
|
||||
kbc_init = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Flush buffer */
|
||||
while (read_status() & OBF)
|
||||
read_data();
|
||||
|
||||
/* Self test. */
|
||||
if (i8042_cmd_with_response(0xaa) != 0x55) {
|
||||
kbc_init = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Test secondary port */
|
||||
if (i8042_cmd_with_response(0xa9) == 0)
|
||||
aux_fifo = fifo_init(4 * 32);
|
||||
|
||||
/* Test first PS/2 port */
|
||||
if (i8042_cmd_with_response(0xab) == 0)
|
||||
ps2_fifo = fifo_init(2 * 16);
|
||||
|
||||
kbc_init = 0;
|
||||
|
||||
initialized = aux_fifo || ps2_fifo;
|
||||
|
||||
return initialized;
|
||||
}
|
||||
|
||||
/* Close the keyboard controller */
|
||||
void i8042_close(void)
|
||||
{
|
||||
if (!initialized)
|
||||
return;
|
||||
|
||||
fifo_destroy(aux_fifo);
|
||||
fifo_destroy(ps2_fifo);
|
||||
|
||||
initialized = 0;
|
||||
aux_fifo = NULL;
|
||||
ps2_fifo = NULL;
|
||||
}
|
||||
|
||||
/** Send command to keyboard controller.
|
||||
* @param cmd: The command to be send.
|
||||
* returns: 0 on success, -1 on failure.
|
||||
*/
|
||||
int i8042_cmd(u8 cmd)
|
||||
{
|
||||
if (!initialized && !kbc_init)
|
||||
return -1;
|
||||
|
||||
if (!i8042_wait_cmd_rdy())
|
||||
return -1;
|
||||
|
||||
write_cmd(cmd);
|
||||
|
||||
if (!i8042_wait_cmd_rdy())
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** Send command to keyboard controller.
|
||||
* @param cmd: The command to be send.
|
||||
* returns: Response on success, -1 on failure.
|
||||
*/
|
||||
static int i8042_cmd_with_response(u8 cmd)
|
||||
{
|
||||
const int ret = i8042_cmd(cmd);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
|
||||
if (!i8042_wait_data_rdy())
|
||||
return -1;
|
||||
|
||||
return read_data();
|
||||
}
|
||||
|
||||
/** Send additional data to keyboard controller.
|
||||
* @param data The data to be send.
|
||||
*/
|
||||
void i8042_write_data(u8 data)
|
||||
{
|
||||
if (!initialized)
|
||||
return;
|
||||
|
||||
if (!i8042_wait_cmd_rdy())
|
||||
return;
|
||||
|
||||
write_data(data);
|
||||
|
||||
if (!i8042_wait_cmd_rdy())
|
||||
return;
|
||||
}
|
||||
|
||||
/**
|
||||
* Probe for keyboard controller data and queue it.
|
||||
*/
|
||||
static void i8042_data_poll(void)
|
||||
{
|
||||
u8 c;
|
||||
|
||||
if (!initialized)
|
||||
return;
|
||||
|
||||
c = read_status();
|
||||
while ((c != 0xFF) && (c & OBF)) {
|
||||
const u8 in = read_data();
|
||||
/* Assume "second PS/2 port output buffer full" flag works */
|
||||
struct fifo *const fifo = (c & 0x20) ? aux_fifo : ps2_fifo;
|
||||
if (fifo)
|
||||
fifo_push(fifo, in);
|
||||
|
||||
c = read_status();
|
||||
}
|
||||
}
|
||||
|
||||
/** Keyboard controller data ready status.
|
||||
* Signals that keyboard data is ready for reading.
|
||||
*/
|
||||
u8 i8042_data_ready_ps2(void)
|
||||
{
|
||||
i8042_data_poll();
|
||||
return !fifo_is_empty(ps2_fifo);
|
||||
}
|
||||
|
||||
/** Keyboard controller data ready status.
|
||||
* Signals that mouse data is ready for reading.
|
||||
*/
|
||||
u8 i8042_data_ready_aux(void)
|
||||
{
|
||||
i8042_data_poll();
|
||||
return !fifo_is_empty(aux_fifo);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns available keyboard data, if any.
|
||||
*/
|
||||
u8 i8042_read_data_ps2(void)
|
||||
{
|
||||
i8042_data_poll();
|
||||
return fifo_pop(ps2_fifo);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns available mouse data, if any.
|
||||
*/
|
||||
u8 i8042_read_data_aux(void)
|
||||
{
|
||||
i8042_data_poll();
|
||||
return fifo_pop(aux_fifo);
|
||||
}
|
||||
|
||||
/**
|
||||
* Waits for keyboard data.
|
||||
* Waits for up to 500msec to receive data.
|
||||
* Returns: -1 on timeout, data received otherwise
|
||||
*/
|
||||
int i8042_wait_read_ps2(void)
|
||||
{
|
||||
int retries = 10000;
|
||||
|
||||
while (retries-- && !i8042_data_ready_ps2())
|
||||
udelay(50);
|
||||
|
||||
return (retries <= 0) ? -1 : i8042_read_data_ps2();
|
||||
}
|
||||
|
||||
/** Waits for mouse data.
|
||||
* Waits for up to 500msec to receive data.
|
||||
* Returns: -1 on timeout, data received otherwise
|
||||
*/
|
||||
int i8042_wait_read_aux(void)
|
||||
{
|
||||
int retries = 10000;
|
||||
|
||||
while (retries-- && !i8042_data_ready_aux())
|
||||
udelay(50);
|
||||
|
||||
return (retries <= 0) ? -1 : i8042_read_data_aux();
|
||||
}
|
|
@ -178,6 +178,31 @@ void mouse_cursor_set_acceleration(u8 val);
|
|||
u8 mouse_cursor_get_acceleration(void);
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* @defgroup i8042 controller functions
|
||||
* @ingroup input
|
||||
* @{
|
||||
*/
|
||||
size_t i8042_has_ps2(void);
|
||||
size_t i8042_has_aux(void);
|
||||
|
||||
u8 i8042_probe(void);
|
||||
void i8042_close(void);
|
||||
|
||||
int i8042_cmd(u8 cmd);
|
||||
void i8042_write_data(u8 data);
|
||||
|
||||
u8 i8042_data_ready_ps2(void);
|
||||
u8 i8042_data_ready_aux(void);
|
||||
|
||||
u8 i8042_read_data_ps2(void);
|
||||
u8 i8042_read_data_aux(void);
|
||||
|
||||
int i8042_wait_read_ps2(void);
|
||||
int i8042_wait_read_aux(void);
|
||||
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* @defgroup serial Serial functions
|
||||
* @ingroup input
|
||||
|
|
Loading…
Reference in New Issue